I don't know. Hatton/Mayweather had the American attention which the German's won't be able to touch that. It could be bigger globally though but I can't imagine it'll be as interesting in the build up, or as widely reported. Hatton/Mayweather had two great, contrasting characters and even though Haye and Wlad are also contrasting, only one is charismatic, so there won't be as many casual fans who are interested.
I think a lot of casual fans will buy the whole "take back the heavyweight crown from the eastern europeans" thing
This being for the Heaveyweight championship, and the amount of time it has been building up. In Europe/Russia it will be HUGE, just see how it does in america, but i think it can beat Hatton/Mayweather. It will be close
Worldwide it will probably be huge, as it should. I dont think it will be as big as some think here in america. As for american ppv's, I doubt it does more then 1 mill.
I agree it'll be mega in other countries, but in the USA, it won't be as big as the Maywearhter/ ODH, or Mayweather/Hatton fights. But it'll easily be the biggest heavyweight fight in the USA since Lewis Tyson. And in the USA, the heavyweight division, and boxing in general, really needs a really big fight like this. Gotta show the lower weight classes what the original flagship division was, and may be, again, one day.
Hard to say since Haye is not well known outside britain but if they play the race card it could be big in US.